VGA to HDMI with Power Charging Adapter Cable, How is the audio transmitted?
Converts a digital HDMI signal into an analogue VGA signal | Supports full high-definition resolution of 720 dp or 1080 dp (Full HD) | Max. resolution 1920 x 1080 @ 60 Hz to 165 Mhz operating frequency
Click Start, and then Control Panel. Select the Hardware and Sound category. Click Manage audio devices, listed under the heading Sound. In the window that opens, a number of devices may be listed under Playback. Among the listed devices, select the device described with HDMI or Digital Audio, and click Set Default. A green tick mark should show that this device is now the selected output device. Click OK to confirm and close the window. The audio should now play back via the HDMI output.